ICSE Class 9 The Language of Chemistry — practice questions
20 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice ICSE Class 9 The Language of Chemistry in the app →A symbol of an element representsWho proposed the modern symbol system using letters of element names?The symbol of sodium is Na because Na is derived fromWhich radical has valency +1?Valency of an element is the number of hydrogen atoms thatThe molecular formula of water isAluminium has valency 3 and sulphate radical SO4 has valency 2. The formula of aluminium sulphate isCalcium has valency 2 and carbonate has valency 2. The formula of calcium carbonate isWhich element has variable valency in its compounds?In the equation Zn + H2SO4 -> ZnSO4 + H2, the reactants areWhich of the following is correctly balanced?Balance: Fe + H2O -> Fe3O4 + H2. Coefficient of H2O isMolecular mass of H2SO4 (H=1, S=32, O=16) isMolecular mass of glucose C6H12O6 (C=12, H=1, O=16) isMagnesium has valency 2; phosphate radical has valency 3. Formula of magnesium phosphate isNumber of oxygen atoms in one molecule of potassium permanganate KMnO4 isWhich state symbol in a chemical equation denotes a substance dissolved in water?An equation written with a double arrow indicates a reaction that isWhich symbol denotes copper, from its Latin name Cuprum?If the formula of a compound is M2O3 and oxygen has valency 2, then valency of M is